The blood platelet counts of a group of women have a
bell-shaped distribution with a mean of
246.8246.8
and a standard deviation of
64.864.8.
(All units are 1000
cells/muμL.)
Using the empirical rule, find each approximate percentage
below.
a.
What is the approximate percentage of women with platelet
counts within
11
standard
deviationdeviation
of the mean, or between
182.0182.0
and
311.6311.6?
b.
What is the approximate percentage of women with platelet
counts between
117.2117.2
and
376.4376.4?